Internal Combustion Engine. Most engines in road going vehicles are 4-cycle internal combustion gasoline engines.

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3
votes
1answer
35 views

Engine won't rev past 2500 in Park/Neutral

I am just through replacing the catalytic converters on an 06 Ford Expedition with about 151k miles on it. To break in new cats, you must run it at idle for about 5 minutes, then increase the engine ...
3
votes
1answer
79 views

1996 Mustang GT won't start with shifter in Park, but will start in Neutral

I just had this weird problem today. The engine will turn fine, but won't start with shifter in Park. Once started in Neutral the motor runs fine with no hesitations. Battery is strong. Any ideas?
0
votes
1answer
35 views

Diesel engine vs petrol engine characteristics [duplicate]

Please explain why Diesel engines (in general): vibrate more. are louder. I understand in principal how both engine types work so feel free to go into technical details. My assumption is that it ...
2
votes
1answer
28 views

Citroen C3 Picasso HDI 1.6 - Oil Consumption Question

I just bought a 1.6 HDI Picasso C3. After driving 1000 km i noticed it consumed about 1/8 of oil on the oil measuring stick. my question is how much liters does the stick measure? is half a stick ...
2
votes
0answers
24 views

Chevy sonic 2014 [closed]

I have a Chevy sonic 2014, purchased from B M W about 2 months ago. My car smelled like it was getting warm. Opened the hood brown sludge. Mechanic says it isn't a head gasket and are unable to detect ...
4
votes
2answers
73 views

Do I need to worry about varying boost pressure when installing an electric supercharger?

Do I require to vary the boost pressure with respect to an increase or decrease of throttle (engine rpm)? *Note: The supercharger is electrically driven (motor) and not by engine crankshaft.
6
votes
3answers
166 views

Weird “old”-sounding engine noise. What's the problem?

Hyundai Sonata 2000 150,000 miles I started getting a noise in the engine that I would describe as "light", and "enginey" Here is a video with sound. https://vid.me/9gkr The sound becomes more ...
6
votes
0answers
104 views

Once-only thud knock when open throttle

I have a 1997 Yamaha TRX850. When I open the throttle I'm hearing a thud knock sound near the left crankshaft cover. That sound does not always appears and I can't find any correlation between ...
1
vote
1answer
38 views

GDI intake cleaning before or after oil change?

I drive a 2014 Kia Rio 1.6l engine with direct injection. I am at 22000km and considering using this intake cleaning product that gets sprayed into the intake. ...
1
vote
0answers
46 views

Supercharging small engine [duplicate]

How do I determine safe supercharged pressure and cfm for a small engine (149 cc)? Yamaha fz 2.0 (India) 9.31 cubic inches 13.1 PS (12.9 BHp) Fuel injected 18.4 engine cfm
1
vote
1answer
87 views

Supercharger calculations

How to determine safe supercharged pressure and CFM for a motor cycle engine (fuel injected 149cc (9.31 cubic inches) 12.9 bhp?
12
votes
3answers
230 views

Why does GM still insist on push rod engines?

GM continues to design and produce push rod (Over Head Valve or OHV) engines while most of their competitors have gone to over head cam (OHC) configurations for their performance engines. Is there a ...
2
votes
0answers
37 views

P0304 code on PT Cruiser

I have a 2005 PT Cruiser Convertible that's leaking oil in #4 cylinder causing engine light to come on. Now, I have changed valve cover gasket and tube seals, spark plugs and wires and coil, pcv ...
6
votes
0answers
39 views

semi loud growling noise at all speeds

I have a 1998 GMC Sonoma SLS with a 4.3 l V6 Vortec. It used to purr, now it growls, sounds like a small diesel engine. Vibration can be felt (mostly in the dead pedal) and also vibrates/growls in ...
9
votes
3answers
94 views

Should I replace piston rings on chevy 350?

I recently acquired a chevy 350 manufactured in 2015 for free because of some crank issues. I'm in the process of rebuilding it and have finished the disassembly of the engine. The engine itself only ...
4
votes
1answer
43 views

Lean Fuel Code on V10

I have 1999 V10 Ford chassis on a 2000 Coachman motorhome. Engine starts great when cold, runs great, idles great, no skipping, missing, etc. Problem is that after driving more than 30 minutes or so ...
2
votes
1answer
41 views

2004 Honda Pilot wont start

I have a 2004 honda Pilot. Ok look carefully it has 510,453 miles on it. It wont start. I had a bad alternator for 2 weeks over charging my battery. I changed it. New spark plugs also. So 2 days ago i ...
4
votes
5answers
96 views

Will my 2002 Mustang make it from California to Iowa?

I have a great 2002 Mustang automatic 6cyl in great condition, but I am a worrier and want some outside opinions. I am the second owner of the vehicle. Have owned it for 1year, 7 months and I get my ...
5
votes
1answer
80 views

engine push rods

I have a Toyota owner Jeep. Had a blown head gasket, most likely cause it got over heated. I removed the head and had machine shop do a valve job and had the head re-surfaced, put together, set the ...
4
votes
1answer
59 views

Vehicle tries to stall when at a stop

Have a 2009 Saturn. Two weeks ago I took it for a basic oil change at the dealership and requested that it be checked out for any other problems but I have noticed that sometimes at a stop light it ...
4
votes
1answer
40 views

Can getting rear ended crack your engine mount?

I was sitting at a dead stop at a traffic light when a pickup truck rear-ended me. I drive a Honda Accord and the bumper withstood the impact pretty well but still needs to be replaced. Immediately ...
5
votes
1answer
68 views

I have engine oil in my coolant. What might be the reason?

I have purchased a pre-owned car. After the purchase I saw there was engine oil in the coolant reservoir and also the coolant level is going down slightly. Engine is not heating up. What do I do? ...
8
votes
1answer
91 views

How often do you need to run a car?

I have a car that is garaged and not used much. How often should I take it out for a drive and for how long each time? I currently get it serviced every 10,000 KM.
4
votes
2answers
55 views

Putting a cover on the bike while engine is hot

Is it safe to cover your bike as soon as you shut the enigne after a 20 mile ride? I cover 40 miles daily to and fro for work. I reach home around 11 pm and barely have the patience to climb down from ...
3
votes
2answers
78 views

fuel system problem

I have a 89 camaro I personally don't think it's a fuel pump issue and I recently changed the relay, but whenever I turn the key over sometimes I hear the fuel pump turn on sometimes I don't. Could it ...
3
votes
0answers
43 views

Engine jolting and struggle starting

I drive a 2002 VW Polo automatic, and in the last few days it's really been struggling to start when it's cold, and then this morning the car would jolt on acceleration every now and again, when the ...
4
votes
1answer
65 views

Diagnosing a rhythmic engine noise

I have a 2000 Toyota Camry with the 2.2l 4 cylinder, 5S-FE engine. The car has 143k miles on it. I currently run 0w40 Mobil 1 full synthetic motor oil with the Mobil 1 filter. When I was changing ...
5
votes
1answer
46 views

Civic R18A2 oil consumption

Looks like my Civic burned or lost 2L of oil in the past 6 months, I think that is excessive. At previous oil change garage mechanics advised me to use 5w30 viscosity oil because 0w30 is too thin. I ...
0
votes
2answers
43 views

94 Jeep Grand Cherokee Laredo

My '94 Jeep seems to want to stall out at red lights and stop signs. It runs fine otherwise. However, upon cranking first thing of the day I have to let it idle for maybe five minutes before driving. ...
6
votes
1answer
39 views

Rubber gasket maker on rocker cover

After recently taking my car to have a new rocker cover gasket fitted as it was badly leaking I noticed the guy who did it put a ton of gasket maker on the rocker cover when he sealed it, heavens ...
9
votes
1answer
94 views

What are the various kinds of tappets / lifters and the advantages / disadvantages of each

A previous question about tappets found here: What are Tappets? covers the basics of tappets. If we go the next step, here are my questions: What are the various kinds of tappets / lifters? What ...
4
votes
1answer
85 views

Is intentional kick-down bad for the engine?

I have a car with automatic gear (Mitsubishi 1600cc, if it matters) and sometimes when I want to gain speed quickly (e.g. when passing a slower car in a two-way road) I do a kick-down. I know it ...
1
vote
0answers
52 views

City golf 1.3 overheating badly

I bought a new thermostat and heat gauge switch, however, my car is overheating. Every time I fill it with water, it sucks the water and I have to refill it. When I switch the car off it over heats ...
4
votes
1answer
94 views

My 95 civic lx from hell

I bought a civic from a couple of girls who had previously said that they had a bit of trouble with the car overheating, but it never broke down on them. It had 120k miles on it and they were asking ...
7
votes
1answer
135 views

What mechanical revolution is measured in “RPM”?

I do realize that it stands for revolutions per minute, but what are the revolving pieces that are measured? Assuming it is the crankshaft, is RPM calculated by the crank shaft sensor, or by some ...
2
votes
1answer
70 views

How good is auto engine start stop feature? [closed]

Some new car models feature this auto engine stop when the car is in complete stop while you foot is on the pedal and auto restart the engine once you release it. Is this "feature" any good? I think ...
4
votes
2answers
71 views

any downsides to early spark plug changes?

Are there any downsides to early spark plug changes? some say 10k 15k etc and some do it as early as 5k =S but would it be okay to get into the habit of changing them after each oil change (6k) miles ...
1
vote
1answer
73 views

OIL ON MY ALTERNATOR

My 1996 XH Ford GLI LONREACH UTE with a 4.0 Tickford motor 5 sp man, had a oil leak (oil leak fixed! and I was quite proud of myself) from the rocker cover gasket, resulting in enough oil that would ...
1
vote
3answers
47 views

03 Pontiac Grand Am will not start. Transmission problems?

I have an 03 Pontiac Grand Am. About 9 months ago I had to put in a new motor, I've also put in a new starter and battery. For the last 5 months my car has not been able to go over 50 mph without my ...
6
votes
4answers
297 views

Do air filters purifty air better with age?

I have been reading in a few places that air filters get better with age, is this true? And how much better? Would it have any effect on quality of the oil or make oil dirty faster? Or is there ...
5
votes
1answer
93 views

Short shifting after full throttle

Other than normal wear and tear, are there any detrimental effects or added harm done to the engine by going full throttle in 1st and/or 2nd gear, then shifting up well before redline (say 4k rpm on a ...
2
votes
2answers
71 views

1999 Toyota Tercel shakes when stopped

The car is old, I know, but it only recently started doing that... When it's in park, and the engine is on, there is a non-noticeable shake, but when it's in drive, and I'm stopped at a light the car ...
9
votes
2answers
552 views

What's the cause of Diesels' typical clatter noise?

I guess it's related to their basically running off knocking, but if I were to explain it to someone like this, it wouldn't convince me neither. [Edit] From ...
6
votes
1answer
109 views

Electric water pump control

Electric fans are now common on cars, both aftermarket and stock. The advantages in horsepower, faster warmup, and hence emissions are well documented elsewhere. The same reasoning can be applied to ...
4
votes
1answer
38 views

ENG PWR REDUCED 2009 Chevy Cobalt LS

I have a 2009 Chevy Cobalt bought used a year ago from a dealership near me. It has about 81,000 miles on it and just recently started messing up. My coolant temp will start heating up to about ...
16
votes
5answers
2k views

Aluminium engine vs Cast Iron engine

What is the advantage that the aluminium engines provide over the cast iron engine apart from the fact of rusting and weight reduction. Manufacturers like to boast about their all new aluminium ...
13
votes
2answers
360 views

What is a leak down tester and what can I do with it?

Background There are quite a few head gasket related questions on the site. Coolant or water in the oil, oil in the coolant or water in a radiator, etc. I'm thinking that some instruction on howto ...
12
votes
3answers
777 views

Cold air intake causing rich condition

This is a follow up question to my initial question which can be found here : LTFT and STFT values are off and don't make sense Car is a 2015 F10 M5 Mods : Cold air intake, aftermarket rear ...
13
votes
2answers
163 views

How do I troubleshoot the source of oil in my coolant?

I would like to know the step by step troubleshooting procedure for discovering the source of oil appearing in coolant. There are several different points of failure that can be the root cause for ...
6
votes
1answer
44 views

Oil leakage or normal engine procedures

It was raining yesterday and I noticed the typical rainbow colouring of some of the water around my car. Couldn't tell there and then if it was a car body fluid leak or just the water going trough the ...